Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 330)

After You’ve Entered Your Program
Chapter 18
18–9
Setting the STI Setpoint
The STI setpoint is the time between successive executions of the STI
subroutine. The allowable range is from 10 ms to 2550 ms (entered in 10 ms
increments). A setpoint of zero disables the setpoint function.
Important: The setpoint value must be a longer time than the execution
time of the STI subroutine file, or a minor error bit is set.
To change the setting:
1. Access the program configuration menu.
2. Arrow up to the option STI SETPOINT and select it.
ENT
6 times
S T I S E T P O I N T
( x 1 0 m s ) 0
3. Type in a new setpoint.
4. Enter the setpoint and return to the home screen.
ENT ESC ESC